# SciLab / Xcos 2026 - ReadF Block

**URL:** <https://scilab.discourse.group/t/scilab-xcos-2026-readf-block/1162>\
**Category:** Xcos\
**Created:** [May 29, 2026, 4:51pm UTC](https://scilab.discourse.group/t/scilab-xcos-2026-readf-block/1162 "2026-05-29T16:51:15Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![greenguy](https://avatars.discourse-cdn.com/v4/letter/g/bb73d2/32.png) [@greenguy](https://scilab.discourse.group/u/greenguy)\
**Post date:** [May 29, 2026, 4:51pm UTC](https://scilab.discourse.group/t/scilab-xcos-2026-readf-block/1162/1 "2026-05-29T16:51:15Z")

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I am trying to use the Readf block and no values are being read from the file. I had this working with an install of 2026 on LMint 21.3 but there were lots of other bugs and stability problems. I found that the Java I had was 11 and read somewhere that 2026 required at least 17. So I upgraded to LMint 22 and that came with Java 21. Not the stability issues have cleared but the same model of simply reading a data file does not work. The debug output on the SciLab console does not show any file read errors but the plot shows nothing. I am wondering if this is another dependency issue.

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**Author:** ![mottelet](https://yyz2.discourse-cdn.com/free1/user_avatar/scilab.discourse.group/mottelet/32/13_2.png) [@mottelet](https://scilab.discourse.group/u/mottelet)\
**Post date:** [June 1, 2026, 6:15am UTC](https://scilab.discourse.group/t/scilab-xcos-2026-readf-block/1162/2 "2026-06-01T06:15:51Z")

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Hello,

Launch Scilab from the command line and give the eventual messages you get there when running the diagram.

S,

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<div class="post-metadata">

**Author:** ![greenguy](https://avatars.discourse-cdn.com/v4/letter/g/bb73d2/32.png) [@greenguy](https://scilab.discourse.group/u/greenguy)\
**Post date:** [June 2, 2026, 7:04am UTC](https://scilab.discourse.group/t/scilab-xcos-2026-readf-block/1162/3 "2026-06-02T07:04:22Z")

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Not sure what you mean. if i run from a terminal ./sclab-cli then it does not allow me to run xcos which is necessary to run the diagram. I think.

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**Author:** ![mottelet](https://yyz2.discourse-cdn.com/free1/user_avatar/scilab.discourse.group/mottelet/32/13_2.png) [@mottelet](https://scilab.discourse.group/u/mottelet)\
**Post date:** [June 2, 2026, 8:17am UTC](https://scilab.discourse.group/t/scilab-xcos-2026-readf-block/1162/4 "2026-06-02T08:17:49Z")

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just run scilab not scilab-cli

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<div class="post-metadata">

**Author:** ![greenguy](https://avatars.discourse-cdn.com/v4/letter/g/bb73d2/32.png) [@greenguy](https://scilab.discourse.group/u/greenguy)\
**Post date:** [June 2, 2026, 1:57pm UTC](https://scilab.discourse.group/t/scilab-xcos-2026-readf-block/1162/5 "2026-06-02T13:57:47Z")

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nothing is printed in the terminal that I launch ./scilab from. In the Scilab Console is printed:  
vent: 1 activated at t=0.000000  
**mod**  
End of activation

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<div class="post-metadata">

**Author:** ![mottelet](https://yyz2.discourse-cdn.com/free1/user_avatar/scilab.discourse.group/mottelet/32/13_2.png) [@mottelet](https://scilab.discourse.group/u/mottelet)\
**Post date:** [June 2, 2026, 8:01pm UTC](https://scilab.discourse.group/t/scilab-xcos-2026-readf-block/1162/6 "2026-06-02T20:01:21Z")

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can you post the diagram and the file you are trying to read ?

S.

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<div class="post-metadata">

**Author:** ![greenguy](https://avatars.discourse-cdn.com/v4/letter/g/bb73d2/32.png) [@greenguy](https://scilab.discourse.group/u/greenguy)\
**Post date:** [June 3, 2026, 2:45am UTC](https://scilab.discourse.group/t/scilab-xcos-2026-readf-block/1162/7 "2026-06-03T02:45:05Z")

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Actually I reverted back to version 2024.0.0 and everything works fine in LMint 22.3.